Mechanical stoker



Nov. 27, 1923. 1,4753@ v J. S STOGDALE MEGHANI CAL STOKER Filed May 2e. 1921 2 sheets-sheet 1 @43 f//S @Hom/w11;

Nov. 27, w23. 1,475,361 J. S. STOGDALE MECHANICAL STOKER Filed May 26. 1921 2 Sheets-Sheet 2 'Paesi-9a,- Nov. 2 1. i923. y

1 sin 'rss PA'raN'r4 orrics.

` 'Josarn sunny mienne, or Tacoma, wasme'ron.

' mamon. sroiina.l l

Application ileil Kay 26,

To all 'whom t ma concern Be it known thyat I, Josnrn .Smm S'DOGD a citizen of the United States, and a resident of the city of Tacoma, county of Pierce, State of Washington,'have invented certain new and useful Improve ments in Mechanical Stokers, of which the following is a specification.

My invention relates to improvements inV mechanical stokers, more particularly to stokers of that character designed for use in connection with railway lloconnzotive or similar` stationary engines; the rincipal objeotf'of the present invention ing to provide a mechanical Stoker for delivering fuel from the tender of ai'ailway locoinotive into the lire box of the locomotive boiler.

lt is a further object of the invention to provide means of the above character adapted to maintain a supply ofcoal in paired hoppers, from which it vis mechanically"v fed through paired doors of the lire box of such locomotives, and distributed over the fire bed.

Other objects of the invention reside inv the details of construction ofthe feeding mechanism whereby the fuel is caused to be distributed equally over all parts of the lire had.

ln'accomplishin these and other objects of the invention, have provided the imroved details of construction, the preierred germs of which are illustrated in the aocompanying drawings, wherein Figure 1 is a vertical, sectional view lon gitudinally through a Stoker .constructed according to the present invention.

Figure 2 is a rear view of the saine taken on theline 2-2 in Figure 1..

Figure 3 is a side view of a Stoker housing; a spring housing being shown in section for better illustration.

Figure d is a longitudinal, vertical section ofthe saine.

Figure 5 is aside View of the Stokeropposite that side shown in Figure 3,; with a spring housing shown 1n section for better illustration. l nxFigure 6 is a plan view of 'one o f the Stoker housings, the top of which is `removedto show the construction, and operation ofthe discharge plate.

Figure 7 is a perspective view of a feedshovel.

in Y

ferring more in detail to the several Y views o the drawings, wherein likel referand wherein coal,

parts- 1 designates what may be the fire box of and 3 designates, as

a locomotive boiler 2,

a whole, a tender drawn by the locomotive,

or other fuel, is carried. The lire box 1 is provided with double doors or openings 1 4 through which fuel may be fed into the saine, and below these has other openings closed by doors 5, through which inspection of the boiler or other work mag7 be done.

xtending horizontally, from the lower part of the tender, forwardly and into the cab of the locomotive is a c lindrical conveyer tube 8, provided at the end within the tender with an opening 9 through which coal may be admitted into the tube and at its forward end with an opening into a connecting tube Y'10 'that leads into the lower end of a vertical conveyor tube 12. This latter tube discharges at its upper end into paired hoppers 13 and 1d, at opposite sides thereof, and froml which the fuel delivered thereto may flow bykgravity into Stoker boxes 15 and ldwhich are closed at their outer ends and at their other ends open respectively through the doors orfopenings 4 and 4 into the lire box l.

Mounted functionally within the conveyer tubes 8 and 12 respectively, are worin conveyors 17 and 18, the drive shafts 19 and 20 of which extend from the adjacent ends of the tubes and areequipped with intermeshing bevel gears 21 and 22 so that they may operate together. The gear 21 has a gear wheel 23 formed thereon which meshes where it is delivered onto horizontal shelves 30, to be delivered therefrom in certain desired amounts, by the reciprocal movement of feeding plates 31 slidable on the shelves, onto the lower floors of the boxes, from which it is then discharged into the re box by the 4action of shovels 32 presently described.

' The means provided for actuating the delivery plates 31 and shovels 32 comprises a shaft 35 which extends horia'ontall through the Stoker boxes as shown best in. igures 1 and 2 and which 'is rotatably drlven by means of a vertical shaft 36 which is mounted in front of the conveyer12'. At-its lower end this shaft has a bevel gear wheel 37 thereon which meshes with a siinllar gear wheel 38 on the shaft 25, and at its upper end has a worm gear 39 meshing with a gear 40 on the shaft 35 the connectlon being such that the latter shaft is rotated in the dI` rection of the arrow in Figures 3 and 5.

Keyed onto the shaft 35 at the right hand sides of the stoker boxes, as shown in Figure 2 are wheels 45, each comprising-a plurality of radially extending arms 45' of differentl lengths, and secure on the shaft at the o posite sides of the boxes are wheels 46, similar to the wheels 45, but having radiatin arms 46 all of the same length.

he discharge lates 31are adapted to slide longitudinal y upon the shelves 30 across and from the openings of the hoppers.

and at their forward ends are provided with slightly wedge shaped nose lates 31" whereby, when the move forwar ly, the coal that has been fe onto the shelves, is scattered and pushed from the shelves onto the lower doors of. the boxes. f

The means provided for reciprocating the plates comprises levers 50 which extend horizontally through slots 51 in the side walls of the Stoker boxes, and at their outer ends are pivotally fixed upon brackets 52 extended laterally from the boxes. rlhe inner ends of these levers are free to move between spaced hanges 53 and 54 ixed to the platesand the levers are actuated forwardly and rearwardly to move the plates likewise, by means of connecting rods 55, fixed pivotally thereto at the rearward ends, and at the for,- ward ends to the lower end portions of levers 56 that are pivotally mounted by pins 57 upon the sides of the boxesvto extend in such position that these ends will be engaged by the arms 46 of the wheels 46 as the latter are rotated by the shaft 35. y

rlhe plates are moved to and' normally retained at their forward limits' of travel, and across the hopper openings, by means of compression 'springs 59 which are contained within tubes 60 mounted onthe forward ends of the sides of the boxes, and which' by means of rods 61 are connected withthe upper ends of the levers 56.

It will be apparent that rotation of thel shaft 35 will cause the arms of the wheels 46 to engage the lower endsofthe levers 56 to move the latter rearwardly and in doing so will cause the plates 31 to move rearwardly from the hopper openings to permit the coal to flow onto the shelves 30. As soon as the arms of the wheels 46 disengage the levers,

' the upper ends of the latter are drawn rearward y by the springs 59 and the plates are envases;

caused to move inwardly to dischar the coal` from .the shelves into the stoker The coal that is thus deposited in the Stoker boxes is fed into the irebox by means of the shovels 32. Each of these shovels comrises a bar bent to form o posite side hangers 7 0-70 and a lower en connecting rod 71 on i' which is fixed a-forwardly directed, V- shaped nose plate 72. The hangers are provided with trunnions 7 3Whereby the shovels are swingingl suspended lfrom the opposite side walls of t e Stoker boxes, and one of the hangers of each shovel, being the one at the right side, extends through the opening in the wall ot the box `to the outside and continues upward from the trunnion and is provided with a laterally extending flange 75, adapted to be engaged by the arms 45 of the wheel 45, and with an extension 76 above said dange whereto a spring 77 is attached to retain the shovel at its vforward position when not actuated rearwardly by the arms of the wheel 45. Assuming then that the device is so constructed and operatively con-l nected ror operation, coal will be delivered through the tubes 8-10 and 12 by action of the worm conveyers into the hoppers 13 and 14.

Operation of the shaft 35 causes rotation of the wheels 46 and these acting u on the levers 56 cause reciprocation of the pates 31 to permit coal to be delivered onto the shelves 30 and then to be discharged thereby into the Stoker boxes.

The parts Aare so arranged that, as the plates 31 come forwardly to deliver the coal into the Stoker boxes, the Shovel'saare drawn rearwardly, and after the coal has been pushed from the shelves, the shovels are released and are thrown forwardly against the coal by the tension of the s rings 77 to cause the coal to be scattered and discharged into the fire box.

It is ap arent that the provision of arms 45 of di erent lengths will cause more or less tension on the springs for the different discharging movements of the shovels, and

v this will cause distribution of the coal to diii'erent parts of the hre box. The shape of the shovel nose plates will also serve to scatter the coal. so that it will be thrown equally tol both sides'of the hre box.

lt is apparent that if it is desired, only one hopper can be used and diderent meansof driving the conveyers could be used without departing from the spirit of the invention; therefore, ll do l. not wish to be limited only to the particular construction illustrated.

Having thus described m invention, what I claim as new therein an desire to secure by Letters Patent, is: v

1. in a stoking device of the class described, a Stoker housing having an open end and a feed opening 'in the top thereof,

a shelf disposed horizontally within the housing below the feed o ening, a slide plate mounted on said shel to move across said feed opening, a shovel suspended within the housing elow said shelf having a suspending leg provided with aA laterally extending flange, a driven shaft extending through the housing, wheels fixed on said shaft having radially extending arms thereon, the arms of one of said wheels being adapted to enga e said shovel leg flange to actuate the shove rearwardly, a lever pivotally fixed to the housing adapted to be engaged at one end by the arms of the other wheel and being operatively connected with l the slide plate so as to move the latter rearwardly, and springs fixed to the housing 4 and connected with the shovel and plate,

JOSEPH STANLEYy STOGDALE.- 

